Character Handling Routines - Sanyo MBC-550 Series User Manual

(AH) = 7 Scroll active page down
(AL) = Number of lines, Input lines blanked
at top of window
AL = 0 means blank entire window
(CH,CL) = Row, column of upper left corner
of scroll
(DH,DL) = Row, column of lower right corner
of scroll
(BH) = Attribute to be used on blank line
CHARACTER HANDLING ROUTINES
(AH) = 8 Read attribute/character at current cursor
position
(BH) = Display page (valid for alpha modes
only)
On exit:
(AL) = Characters read
(AH) = Attribute of character read (alpha
modes only)
(AH) = 9 Write attribute/character at current
cursor position
(BH) = Display page (valid for alpha modes
only)
(CX) = Count of characters to write
(AL) = Characters to write
(BL) = Attribute of character (alpha)/color
of char (graphics) see note on write
dot for bit 7 of BL =1.
(AH) = 10 Write character only at current cursor
position
(BH) = Display page (valid for alpha modes
only)
(CX) = Count of characters to write
(AL) = Character to write
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